Connecting rod structure of a laser sight of a gun

ABSTRACT

A laser sight is coupled to a gun with a connecting rod; the connecting rod includes a rod body, and an expanding and fixing sleeve having a truncated-cone shape; the rod body is passed through the sleeve, and the sleeve is inserted in a joining hole of the gun; the rod body has a front threaded portion threadedly joined to the laser sight, a middle truncated-cone shaped section, and a male threaded portion adjoining the truncated-cone shaped section; the expanding and fixing sleeve has a lengthways extending gap thereon, and a truncated-cone shaped hole receiving the truncated-cone shaped section of the rod body; the taper of the truncated-cone shaped section of the rod body matches that of the truncated-cone shaped hole of the sleeve; the sleeve has a female threaded portion in the truncated-cone shaped hole, which is threadedly engaged with the male threaded portion of the rod body.

BACKGROUND OF THE INVENTION

1. Field of the invention

The present invention relates to a connecting rod structure of a lasersight of a gun, more particularly one, which includes an expanding andfixing sleeve to be capable of coupling a laser sight to any one ofvarious guns with different-diametered joining holes.

2. Brief Description of the Prior Art

Various survival games are exciting, entertaining and getting popular.Players are divided into groups, and compete against each other with BBguns or paint pellet guns in a kind of survival game. In order to bemore accurate at shooting with BB guns or paint pellet guns in such asurvival game, the players can use the original front sight of their gunor a laser sight, which is usually coupled to the gun in a separablemanner by means of a connecting rod.

A currently existing connecting rod structure of a laser sight of a gunhas a threaded portion at a front end, and a truncated-cone shapedinsertion portion at a rear end; the laser sight is threadedly joined onthe front threaded portion of the connecting rod at a threaded holethereof while the connecting rod is joined to the gun by means ofinserting the truncated-cone shaped insertion portion of the connectingrod in a joining hole of the gun. The above-mentioned connecting rodstructure is found to have the following drawbacks:

1. The diameter of the truncated-cone shaped insertion portion of theconnecting rod can be changed. Therefore, the connecting rod can only beused to couple the laser sight to those guns that have a joining holematching the truncated-cone shaped insertion portion thereof; in otherwords, the connecting rod isn't convenient to use.

2. The connecting rod and the joining hole of the gun can wear after theconnecting rod have been joined to and taken down from the gun manytimes. Consequently, the connecting rod can no longer be fixedly joinedto the joining hole of the gun, and the laser sight can move relative tothe gun in use.

Therefore, it is a main object of the present invention to provide animprovement on a connecting rod structure of a laser sight of a gun toovercome the above problems.

SUMMARY OF THE INVENTION

A connecting rod in accordance with an embodiment of the presentinvention includes a rod body, and an expanding and fixing sleeve with atruncated-cone shape. The rod body is passed through the sleeve whilethe sleeve is inserted in a joining hole of the gun. The rod body has afront threaded portion joined to the laser sight, a middletruncated-cone shaped section, and a male threaded portion adjoining thetruncated-cone shaped section. The expanding and fixing sleeve has alengthways extending gap thereon, and a truncated-cone shaped holereceiving the truncated-cone shaped section of the rod body; the taperof the truncated-cone shaped section of the rod body matches that of thetruncated-cone shaped hole of the sleeve. The sleeve has a femalethreaded portion in the truncated-cone shaped hole, which is threadedlyengaged with the male threaded portion of the rod body. Therefore, thesleeve can be expanded to closely come into contact with the joininghole of the gun by means of turning the rod body. In other words, theconnecting rod can be used to couple the laser sight to any one ofvarious guns with different-diametered joining holes.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be better understood by referring to theaccompanying drawings, wherein:

FIG. 1 is an exploded perspective view of the present invention,

FIG. 2 is a perspective view of the present invention,

FIG. 3 is a partial sectional view of the present invention in use (1),

FIG. 4 is a partial sectional view of the present invention in use (2),and

FIG. 5 is a side view of a gun with the connecting rod of a laser sightaccording to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring to FIGS. 1 and 2, a preferred embodiment of a connecting rod(a) of a laser sight in the present invention consists of a rod body 1,an expanding and fixing sleeve 2, and a stopping ring 3.

Referring to FIG. 5 as well, the rod body 1 includes a threaded portion10 at a front end thereof, which is to be connected to a laser sight (b)of a gun; the laser sight (b) has a threaded hole (b1), and the threadedportion 10 of the rod body 1 is threadedly inserted in the threaded hole(b1). The rod body 1 includes a contacting block 11 next to the threadedportion 10 so that the laser sight (b) will be pressed against thecontacting block 11 after the rod body 1 is joined to the laser sight(b).

Furthermore, the rod body 1 has a truncated-cone shaped section 12 nextto a rear end thereof while the expanding and fixing sleeve 2 has atruncated-cone shape, and a truncated-cone shaped through hole 21 toreceive the truncated-cone shaped section 12 of the rod body 1, as shownin FIG. 3; the taper of the truncated-cone shaped section 12 of the rodbody 1 matches the taper of the truncated-cone shaped through hole 21 ofthe sleeve 2.

The expanding and fixing sleeve 2 has a lengthways extending gap 22thereon, and a female threaded portion 211 in a smaller portion of thetruncated-cone shaped through hole 21 thereof. Furthermore, the rod body1 has a male threaded portion 13 adjoining a rear end of thetruncated-cone shaped section 12, and an annular groove 14 on a rearmostportion thereof.

Therefore, when the male threaded portion 13 of the rod body 1 isthreadedly passed through the female threaded portion 211 of thetruncated-cone shaped through hole 21 of the expanding and fixing sleeve2, the truncated-cone shaped section 12 of the rod body 1 will be passedinto the truncated-cone shaped through hole 21 of the expanding andfixing sleeve 2. Consequently, the expanding and fixing sleeve 2 will beforced to expand; the diameter of the expanding and fixing sleeve 2 willincrease with the distance the truncated-cone shaped section 12 of therod body 1 is passed into the truncated-cone shaped through hole 21 ofthe sleeve.

The stopping ring 3 is C-shaped. In Assembly, the rod body 1 is passedthrough the truncated-cone shaped through hole 21 of the expanding andfixing sleeve 2, with the male threaded portion 13 thereof beingthreadedly engaged with the female threaded portion 211 of the expandingand fixing sleeve 2, and with the annular groove 14 being outside thesmaller end of the sleeve 2, and the stopping ring 3 is positionedaround the annular groove 14 so as to prevent the expanding and fixingsleeve 2 from separating from the rod body 1.

In use, referring to FIGS. 3 and 5, the connecting rod (a) is insertedin a joining hole (c1) of a gun (c) from the smaller end of theexpanding and fixing sleeve 2. Next, the rod body 1 is turned so thatthe male threaded portion 13 thereof moves further into the femalethreaded portion 211 of the expanding and fixing sleeve 2, and thetruncated-cone shaped portion 12 thereof moves inwardly of thetruncated-cone shaped through hole 21 of the expanding and fixing sleeve2. Therefore, the expanding and fixing sleeve 2 increases its diameterso as to closely come into contact with the inner side of the joininghole (c1) of the gun (c). Next, the threaded portion 10 of the rod body1 of the connecting rod (a) is threadedly inserted in the threaded hole(b1) of the laser sight (b); thus, the laser sight (b) is securelyjoined on the connecting rod (a). Consequently, the laser sight (b) isfirmly coupled to the gun (c) by means of the connecting rod (a).

The diameter of the expanding and fixing sleeve 2 will decrease if therod body 1 is turned in such a direction that the truncated-cone shapedportion 12 thereof moves outwardly of the expanding and fixing sleeve 2;thus, the connecting rod (a) can be separated from the joining hole (cl)of the gun (c). Therefore, the connecting rod (a) of the presentinvention can be used to couple the laser sight (b) to any one ofvarious guns with different-diametered joining holes. The joining hole(c1) of the gun (c) and the expanding and fixing sleeve 2 can wear, andthe connecting rod (a) can become loose after having been used for along time. To handle this problem, the user only has to turn the rodbody 1 so as to further increase the diameter of the expanding andfixing sleeve 2; after the diameter of the expanding and fixing sleeve 2in increased, the connecting rod (a) can be firmly fixed in the joininghole (c1) of the gun (c) again.

From the above description, it can be seen that the present inventionhas the following advantages:

1. The expanding and fixing sleeve of the connecting rod of the presentinvention will increase its diameter so as to closely come into contactwith a joining hole of a gun when the rod body is turned so that themale threaded portion thereof moves further into the female threadedportion of the expanding and fixing sleeve, and the truncated-coneshaped portion thereof moves inwardly of the truncated-cone shaped holeof the expanding and fixing sleeve. Therefore, the connecting rod of thepresent invention can be used to couple a laser sight to any one ofvarious guns with different-diametered joining holes.

2. The joining hole of the gun and the expanding and fixing sleeve canwear to cause the connecting rod of the present invention to becomeloose after having been used for a long time; to handle this problem,the user only has to turn the rod body of the connecting rod so as tofurther increase the diameter of the expanding and fixing sleeve; thus,the connecting rod will be firmly joined on the gun again.

1. Connecting rod structure of a laser sight of a gun, comprising a rodbody; the rod body including a truncated-cone shaped section; the rodbody including a male threaded portion at a first end thereof, whichadjoins the truncated-cone shaped section; and an expanding and fixingsleeve having a truncated-cone shape; the expanding and fixing sleevehaving a lengthways extending gap thereon; the expanding and fixingsleeve having a truncated-cone shaped through hole receiving thetruncated-cone shaped section of the rod body; a taper of thetruncated-cone shaped section of the rod body matching a taper of thetruncated-cone shaped through hole of the sleeve; the expanding andfixing sleeve having a female threaded portion in the truncated-coneshaped through hole thereof, which is threadedly engaged with the malethreaded portion of the rod body.
 2. The connecting rod structure of alaser sight of a gun as claimed in claim 1, wherein the rod body has anannular groove on one end thereof, and a stopping ring is secured aroundthe annular groove.
 3. The connecting rod structure of a laser sight ofa gun as claimed in claim 2, wherein the stopping ring is C-shaped. 4.The connecting rod structure of a laser sight of a gun as claimed inclaim 1, wherein the rod body has a second threaded portion on a secondend thereof, which points to an opposite direction of the first end ofthe rod body; the rod body having a contacting block adjoining thesecond threaded portion thereof.
 5. The connecting rod structure of alaser sight of a gun as claimed in claim 4, wherein the rod body has anannular groove on one end thereof, and a stopping ring is secured aroundthe annular groove.